When it was revealed last month that Alex Garland would be making his directorial debut with the sci-fi dramaEx Machina, we learned that the story would center on three main characters. And while there are may projects that flounder in between the announcement and casting phases, this one is moving right along and seems to have already found two of its three leads.

The Wrap is reporting that both Oscar Isaac and Domnhall Gleeson are now in talks to star in the new movie, which tells the story of a billionaire programmer who selects one of his employees to come to his estate and test out his greatest creation: "an artificially intelligent female robot." While nothing has been confirmed at this point, sources close to the production say that Isaac would play the billionaire and Gleeson will be the employee. What's more, the site says that Garland and producer Scott Rudin have already begun narrowing down actresses for the role of the android, and are now looking at both Felictiy Jones (soon to be see in Marc Webb's The Amazing Spider-Man 2) and Alicia Vikander (who co-starred with Gleeson in Joe Wright's Anna Karenina).

Both stars have been very busy of late and working with some great filmmakers. Gleeson will soon be seen alongside Rachel McAdams and Bill Nighy in Richard Curtis' About Time (which will be out in November) and has also wrapped on John Michael McDonagh's Calvary, in which he stars with his father Brendan Gleeson. Isaac, meanwhile, plays the titular role in the Coen brothers' highly anticipated music dramedy Inside Llewlyn Davis, and will also be in Hossein Amini's The Two Faces of January and Charlie Stratton's Therese.